This article walks you through penicillin soup from meaning to method, with a clear Italian-style recipe built around chicken broth, pastina, eggs, and Parmesan. It’s designed for anyone cooking for sick days, cold weather soups, or simple high-protein comfort food using pantry staples, with practical tips, variations, and storage guidance.
I’ve prepared this soup more times than I can count, usually with a saucepan, a wooden spoon, and very little patience for complicated steps. Over time, I learned how small details like egg tempering, broth temperature, and pasta size completely change the final result.
The moment the beaten egg threads hit hot broth, the soup turns glossy and fragrant, tasting like warm silk infused with chicken fat and nutty Parmesan, the kind of flavor that makes you stop mid-spoon.
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Healing Italian Penicillin Soup
Ingredients
Method
- In a large saucepan or Dutch oven, combine chicken broth, onion, carrots, celery, garlic, and salt. Bring to a boil over high heat.
- Reduce heat to medium-low and simmer for 10 minutes, or until vegetables are softened. Using a slotted spoon, transfer the vegetables and 1 cup of broth to a blender. Secure the lid (with center cap removed), cover with a clean towel, and blend until smooth (about 30 seconds).
- Stir the blended mixture back into the soup. Add thyme sprigs, bay leaves, and the cheese rind. Bring back to a gentle boil over medium-high heat.
- Add pastina, reduce heat to medium-low, and simmer for 18–20 minutes, stirring occasionally. Add shredded chicken during the last 3 minutes of cooking.
- Remove and discard thyme sprigs, bay leaves, and cheese rind. Serve hot, garnished with chopped parsley and extra grated Parmigiano-Reggiano if desired.
Nutrition
Notes
- For extra depth, use homemade chicken stock if available.
- The cheese rind adds umami richness, don’t skip it!
- Leftovers thicken as the pasta absorbs broth. Add a splash of water or broth when reheating.
- You can swap pastina for orzo or ditalini.
Tried this recipe?
Let us know how it was!What is Penicillin Soup?
Penicillin soup is a traditional name for a simple, nourishing chicken-based soup, most commonly Italian chicken pastina soup, made with broth, small pasta, egg, and cheese. The term “penicillin” is metaphorical, reflecting the soup’s long-standing association with recovery, warmth, and easy digestion during illness, not the presence of any antibiotic.
This soup appears across Italian and Jewish food traditions, where it’s valued for its light texture, savory broth, and ability to be prepared quickly with basic ingredients like chicken stock, pastina, eggs, and Parmesan or Pecorino Romano. Its reputation comes from cultural practice and comfort, not medical treatment.
Italian Penicillin Soup Ingredients
In penicillin soup, each ingredient plays a specific role in building flavor without heaviness. Lower-sodium chicken broth forms the backbone, allowing the natural taste of chicken and aromatics to come through while giving you control over salt. Onion, carrots, and celery create a classic mirepoix that adds gentle sweetness and depth as they soften, while garlic sharpens the broth with savory warmth. Thyme sprigs and fresh bay leaves infuse subtle herbal notes that round out the soup without overpowering it.
Uncooked pastina pasta thickens the broth slightly as it cooks, giving the soup its signature silky texture. Rotisserie chicken adds protein and richness with minimal effort, making this a practical homemade penicillin soup for busy days. A Parmigiano-Reggiano cheese rind melts slowly into the broth, contributing umami and body; Pecorino Romano rind is a common substitute. Fresh flat-leaf parsley brightens the finished soup, balancing the richness with a clean, green finish.
What type of pasta is used in Italian penicillin soup?
The pasta traditionally used in Italian penicillin soup is pastina, a category of very small pasta shapes designed to cook quickly and blend smoothly into broth. Common varieties include stelline (tiny stars), acini di pepe, ditalini piccoli, and orzo. These shapes absorb liquid without becoming chewy, helping the soup develop a slightly thick, silky texture rather than a noodle-heavy bite.
Pastina is preferred because its size allows it to suspend evenly in the broth, making the soup easier to eat and digest, especially during sick days. When pastina isn’t available, small substitutes like Israeli couscous broken down, small pearl pasta, or even short-grain rice are commonly searched alternatives, though they slightly change the final texture.
How to Make Italian Penicillin Soup
This method breaks the cooking process into clear visual stages so you know exactly what to look for as the soup comes together.
Start by gently sautéing the onion, carrots, celery, and garlic in a wide soup pot. The vegetables should soften and turn glossy, releasing a sweet, savory aroma without browning; if they color too quickly, the heat is too high.
Once the aromatics are tender, add the chicken broth along with the herbs and cheese rind. As the liquid heats, the surface should shift from still to lightly bubbling, then settle into a calm simmer where steam rises steadily but the broth stays clear.
After removing the herbs and rind, stir in the pastina. The broth will gradually thicken as the tiny pasta cooks and releases starch; stir occasionally to prevent sticking or clumping at the bottom.
Fold in the shredded chicken and parsley near the end. The soup should look cohesive and slightly creamy, with evenly suspended pasta and chicken rather than sinking solids.
Taste, adjust seasoning, and serve while hot.
Tip: If the soup thickens too much as it rests, loosen it with a splash of warm broth.
Recipe Variations
This section explores how penicillin soup adapts across different culinary traditions and dietary needs, while preserving its core purpose: a simple, nourishing, broth-based dish built for warmth and ease of digestion.
Italian Penicillin Soup with Chicken
This version leans into the most familiar preparation, using tender chicken simmered directly in the broth or added shredded near the end. Keeping the chicken moist is key, gentle heat prevents dryness and allows the broth to stay clear while gaining depth. Many cooks prefer this approach for a traditional penicillin soup profile because the chicken fat subtly enriches the texture without making it heavy. If using rotisserie chicken, add it only at the final stage to preserve softness.
Penicillin Soup Jewish
In Jewish cooking, penicillin soup is closely associated with clear chicken broth enriched by long-simmered bones and aromatic vegetables. The texture is lighter, with an emphasis on clarity rather than thickness, and it’s often paired conceptually with matzo balls instead of pastina. While the structure differs, the intent overlaps: a soothing, protein-rich soup built on collagen-rich stock and slow extraction of flavor.
Penicillin Soup Vegetarian
A vegetarian adaptation replaces chicken broth with a robust vegetable stock built from onion, carrot, celery, garlic, and herbs. To mimic depth, Parmesan-style rinds made without animal rennet or a touch of white miso are common substitutes. The result keeps the soft, spoonable consistency while fitting plant-based diets.
Italian Penicillin Soup Benefits
Italian penicillin soup is valued less for bold flavors and more for how gently it supports the body, especially when appetite is low or digestion feels sensitive. Its benefits come from the way simple ingredients work together rather than from any medicinal claim.
- Hydration support: A warm, broth-based soup helps maintain fluid intake, which is important during colds, fatigue, or recovery days.
- Easy digestion: Soft pastina, tender chicken, and cooked vegetables require minimal chewing and are easier on the stomach than heavier meals.
- Protein intake without heaviness: Chicken and Parmigiano-Reggiano contribute protein and amino acids without added fats or complex sauces.
- Electrolyte balance: Broth naturally provides sodium and minerals that may help replenish what’s lost through sweating or reduced eating.
- Aromatic stimulation: Garlic, thyme, and bay leaf release volatile compounds that can help open the appetite and make food more appealing when senses feel dulled.
- Calorie efficiency: The soup delivers nourishment in a compact form, useful when portions need to stay small.
While penicillin soup is not a medical treatment, its structure makes it a practical, nourishing option during periods of low energy or illness.
Serving and Pairing Suggestions
Serve penicillin soup hot, ideally just after the pastina has reached a tender but intact texture. At this stage, the broth is lightly thickened and the flavors are fully integrated without becoming starchy or flat. Wide, shallow bowls help retain heat while making it easier to scoop both broth and pasta in each spoonful.
For pairing, keep sides simple and neutral so they don’t compete with the soup’s delicate profile. Crusty Italian bread, plain crackers, or toasted baguette slices work well for dipping and add contrast in texture. If serving it as part of a larger meal, a small green salad dressed with lemon and olive oil provides freshness without heaviness. Grated Parmigiano-Reggiano can be offered at the table for those who prefer extra savory depth, while a drizzle of good olive oil enhances aroma just before serving.
Storage Instructions
Allow penicillin soup to cool slightly before storing to prevent excess condensation and separation. Transfer it to an airtight container and refrigerate promptly; keeping it sealed helps preserve the broth’s clean flavor and prevents the pasta from absorbing too much liquid too quickly.
In the refrigerator, the soup holds well for several days, though the pastina will continue to soften as it sits. For best texture, store the soup without additional pasta if you plan to make it ahead, or add a small splash of broth when reheating to loosen the consistency. Freezing is possible, but the pasta may lose its delicate structure once thawed, resulting in a thicker, porridge-like texture.
Always reheat gently over low heat, stirring occasionally to prevent sticking. Avoid boiling, which can dull the herbs and dry out the chicken.
FAQ
Why do they call it Italian penicillin soup?
The name comes from tradition, not medicine. Italian penicillin soup earned its nickname because it’s commonly prepared during colds or fatigue, when warm broth, protein, and easy-to-digest foods are most appealing.
What is the best soup to break up mucus?
Soups made with hot broth, garlic, and herbs are often preferred because steam and warmth can help thin mucus temporarily.
Does Italian penicillin soup have ginger in it?
No, ginger is not a traditional ingredient in Italian penicillin soup. The flavor profile relies on onion, garlic, herbs like thyme and bay leaf, and sometimes cheese rind.
Does penicillin soup contain antibiotics?
No. Penicillin soup does not contain antibiotics or penicillin. The name is purely symbolic and refers to comfort and tradition, not pharmaceutical ingredients.
Conclusion
I love this soup because it never asks for much, just a pot, a few quiet minutes, and ingredients that feel familiar rather than impressive. I’ve made it when I was tired, when someone I cared about wasn’t feeling well, and when cooking needed to feel grounding instead of creative. Every time, it reminds me that good food doesn’t have to perform, it just has to do its job well.
What keeps me coming back is how forgiving it is. The broth welcomes small adjustments, the pasta softens exactly when you need it to, and the final bowl always feels steady and reassuring. It’s the kind of dish I trust, one I know will be there for me on days when that matters most. If you’re looking for another light, soothing soup when you’re under the weather, wonton soup is a great option with a gentle broth and soft dumplings that are easy to enjoy.
